Re: [PATCH] SLUB use cmpxchg_local

[Andi Kleen]

Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx> writes:
> 
> The measurements I get (in cycles):
>              enable interrupts (STI)   disable interrupts (CLI)   local CMPXCHG
> IA32 (P4)    112                        82                         26
> x86_64 AMD64 125                       102                         19

What exactly did you benchmark here? On K8 CLI/STI are only supposed
to be a few cycles. pushf/popf might me more expensive, but not that much.

-Andi
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